OUR ENVIRONMENT

An online crossword puzzle with 20 words. Play it free at AgileCrosswords.com.

Clues

The chemicals that cause depletion of ozone layer.
Substances which can be broken down into simpler harmless substances.
Large sized carnivores which are not preyed upon further by other carnivores.
The harmful radiations that are absorbed by ozone layer.
Sequence of organisms where energy is transferred in the form of food.
Undesirable changes in the physical, chemical or biological characteristics of air, soil or water.
A self-contained unit of living things and their non-living environment.
Organism which consume food prepared by producers.
This means 'to use less'.
The amount of energy transferred from one trophic level to the next is _______ percent.
The progressive increase in concentration of non-biodegradable substances at each trophic level.
A step in a food chain at which the transfer of food(or energy) takes place.
Microorganisms that obtain energy from dead organisms.
Animals that consume plants.
Animals that eat both plants and animals.
Producer organism which synthesize their own food.
Chemicals that are used to kill a pest organism.
Organisms which produce food by photosynthesis.
Recovery and processing of materials after thay have been used.
This means 'to use things again and again'.